Keychat users can set their own receiving relay for each chat room.
If both parties in the conversation set different receiving relays, the sending relay and receiving relay will be different for the participants, which can enhance metadata privacy. 
Discussion
iOS or Android ?
Keychat is currently not stable enough, so early testers can only download it through the Android APK. We are working on making it stable, and then we will add it to the iOS and Android app stores.
